Chicago is generally regarded as the home of improvised comedy, but Los Angeles -- with institutions like the Groundlings and iO West -- is just as much of a hotbed for this artform.

Just ask Stephon Marbury.

While Starbury remains an inactive New York Knick, he's been spending a fair amount of time in LA. His latest off-court venture -- improv -- came about as a fluke.

Enterprising YouTube enthusiast Brendan McNamara was driving in LA recently when he saw Marbury sitting at a bus stop a half a mile from his house. The aspiring filmmaker jumped into action.

McNamara tells Slam Online:

so i grabbed my camera and hustled back to where i saw him - turns out he was waiting on his car to be fixed at a shop right behind him - and asked him if he'd shoot some improv stuff with me at the bus stop.

i was a little surprised he said yes but he did and we rolled and goofed and i'm chopping 'em up into little bite-sized pieces to go up every day...

Here's the result:

One of the fundamentals of improvisation is the ability to quickly think on one's feet. Marbury has this down -- as evidenced by his strategic plug for his Starbury apparel line.